【摘要】 在山西中部研究发展复播玉米生产,是增加玉米产量与收入的有效途径。适宜品种少、栽培产量低是生产中存在的主要问题。以特早熟品种‘并单4号’、‘特早1号’、‘极早单2号’和早熟品种‘郑单958’为试材,经过4个密度和3个播期的多因素试验与分析。结果表明:品种间以‘并单4号’和‘特早1号’产量较高,为6308kg/hm2和6255kg/hm2,均比对照‘极早单2号’极显著增产,‘郑单958’未正常成熟。密度间以75000株/hm2产量高(6231kg/hm2),67500株/hm2减产显著,再降低密度即极显著减产。播期以6月25日产量最高(6723kg/hm2),6月30日和7月5日迟播均极显著减产。迟播使玉米生育中后期受低温及早霜影响,秃尖增加、穗粒数和百粒重下降与最终减产关系密切。此研究三因素互作效应明显:应用‘并单4号’和‘特早1号’,采用75000株/hm2密度,于6月25日播种产量分别达8003kg/hm2和7770kg/hm2。更多还原

【Abstract】 Research and development resowing maize production was to increase maize production and income effective way in Shanxi middle area.Less suitable varieties and the low cultivation yield were the main problems in the production.This research took the especially early variety ’ Bingdan4 ’,’ Tezao 1 ’,’ Jizaodan 2 ’ and the early variety ’ Zhengdan 958 ’ as supplied material.By multi-factors test and analysis of 4 densities and 3 planting periods.The results showed that:in the different material,the yield of ’ Bingdan 4 ’ was the highest,as being 6308 kg/hm 2.The second yield was the especially ’ Tezao 1 ’,as being 6255 kg/hm 2.Compared with ’ Jizaodan 2 ’,the both were highly significant increase.But ’ Zhengdan958 ’ did not mature normally.In the different densities it was the highest yield with 75000 plants/hm 2,as bing 6231 kg/hm 2,and with 67500 plants/hm 2 its yield decreased significantly.As lower and lower density the yield was significantly decrease.Sowing in June 25 th the yield was 6723 kg/hm 2,but in June 30 th and July 5 th,as delayed sowing it was significantly decrease.So later sowing in the late growth of maize,under the low temperature and the early frost,resulting in bald increased grain number and grain weight decreased,the yield was to decrease.The interaction of three factors were:selected ’ Bingdan 4 ’ and ’ Tezao 1 ’,using 75000 plants/hm 2 density,and planting on June 25 th,the yield was the highest to 8003 kg/hm2 and 7770 kg/hm2.更多还原